Utilizing the exhaust of engines



t e nv h .sv e e h s* 2 W A H s N E R D. a d 0 M 0 m UTILIZING THE EXHAUST 0F ENGINES.

Patented June 17, 1884.

Rw 0 5 nu 0 3 nw N (No Molel.) 2 sheets-sheet 2..

D. RBNSHAW.

UTILIZING THE EXHAUST 0F ENGINES.

No. 309,505. PatentedJune 17, 1884.

lilnrrnn drains ldnrnnfr UTILIZING THE. EXHAUST OF ENGINES..

SPECIFECATION forming part of Letters Patent No. 300,505, dated June l?, 1884.

Application filed November 24, 1883.

To all Icwm, if; 'nmfj concern,.-

Be it known that I, Davie Rnxsimw, of Braintree, in the county of Norfolk and State of Massachusetts, have invented certain new and useful Improvements in Methods of and Apparatus for Utilizing the Exhaust of Engines; and I do hereby declare that the following kis a full, clear, and exact description of the invention, which will enable others skilled in the art to which it apperta-ins Ato make and use the sa me, reference being had tothe accompanying drawings, and to the letters ol" reference marked thereon, which form a part of this specification.

rllhis invention has for its object the utilization ot' the exhaust of engines, whereby the heat of said exhaust may be continually utilized in the generation of steam, and also the water necessarily used in the production of said steam is continually used, except that of the ordinary leakagcs.

A further object of the invention is to produce an instrument detachable and independ cnt for carrying said objects into effect.

To these ends the invention essentially consists in the method of'oontrolling and manipulating the exhaust ol" the engine, and in means :for prevent-ing back-pressure ol the exhaust .when subjected to atmospheric pressure or to any throttling device common in exhaust mechanism.

I will now proceed to describe one means of carrying my invention into effect. I do not wish to confine myself to any particular construction et tool or instrument or any variation thereof, as the invention is broadlyto any means for carrying the same into effect.

Figure l shows a longitudinal section of two vessels, preferably spherical, and a plan view of a rotary pump; Fig. 2, a plan sectional view of a single sphere and pump, with a livesteain chamber interposed between the pump and sphere, the objects of which will be more fully hereinafter described.

A is a vessel or reservoir for the reception of water from the boiler at boiler-pressure, preferably of spherical form.

B is a pipe for the reception ol' the exhaust, and is iitted with a suitably-tapering nozzle, Zi.

C is the outlet from the sphere A, into which the tapering nozzle b enters in such manner (No model.)

as to deliver the exhaust steam into contact with the boiler-water at the point of its greatest speed.

D is a sphere of longer diameter than A, 5 for the reception of the commingled exhaust and boiler-water, the object of which is to more fully utilize the combined force of the exhaust and boiler-water pressure, also to steady the flow or delivery of such commingled 6o steam and water to the rotary pump or other suitable device; otherwise the flow might be intermittent and somewhat objectionable.

E is a rotary pump, or may be other suitable device, for taking from and receiving from 6 the spheres the commingled boiler-water and exhaust, relieving them of back-pressure, and forcing the same into the boiler from which they were taken.

j" is a connection between spherical reser- 7 voir D and pump E.

c is an overflow-pipe l'or creating a current through the spheres; c', a valve or pipe.

7i is a delivery-pipe leading from pump to boiler. l

fi andj are fast and loose pulleys for operating rotary pump.

l; is a lock-nut, by which the exit-nozzle or delivery of the exhaust to the boiler-water is controlled in the connection G, and also the 8 quantity or delivery ol'. boiler-water to vessel or reservoir D.

Z is the boilerdvater delivery-pipe.

c is the boiler-water outlet from the vessel A, into which the adjustable tapering nozzle 8 b enters in such manner'as to deliver the exhaust into contact with the boiler-water at the point of its greatest speed.

D', Fig. 2, is a chamber surrounding the mingled water and exhaust outlet, for the reception of live steam and its delivery in the form of an outer annular jet to the commingled stream of exhaust and boiler-water while passing through, thus increasing the force ot' the volume to the pump. 9

d is a supply-pipe for live steam from boiler to chamber D'.

It will be seen that in this construction the location olVA the pump or 'forcing device is an important feature, as the combined effect of roo suction caused bythe pump and force exerted by the boiler-water pressure is such as to prevent all back-pressure of the boiler-water on the exhaust-delivery. This is a matter of movment, and greatly simplifies the attaining of the object in view. It will also be seen that this constant current of steam and water can be maintained without any lback-pressure on the exhaust-outlet, while flowing onto the pump with force equal to if not greater than that due to the boiler-pressure only; hence by thus locating the pump the primary power necessary to cause it to give steadiness and certainty to the action of this process is reduced to a mini- 11111111.

The operation is as follows: The engine being started, the overflow-pipe is opened to the atmosphere, water from the boiler being in full communication with the sphere or reservoir. When the current is complete and steady, the rotary pump is put in motion and the overflow shut olf. rllhe pump now carries the commingled steam` and Water from the sphere or reservoir faster than the exhaust is delivered, and thereby relieves the engine of back-pressure, and in fact causes a suction by which the action of the engine is enhanced.

,When a full current is under headway, the

pump will have but little tofdo as the force of the boiler-water and the exhaust will greatly assist the pump, and thus but little power is exerted to run it. However, when an increased velocity is required I may admit live steam into chamber D, which passes into and with the mixture into the pump.

Having described my inventiomwhat I claim as-new, and desire to secure by Letters Patent, 1s-

l. The method herein described of utilizing the exhaust of engines by returning it into the boiler from which it was taken by rst uniting it in a reservoir with a body of water from the boiler under boiler-pressure, then pumping the combined mixture into the said boiler.

2. The method herein described of utilizing the exhaust of engines by uniting water from the boiler under boiler-pressure with the exhaust, and then pumping them from the suction end of the vessel, whereby increased velocity is imparted to them, and returning them into the boiler from which they were taken.

3. Ihe combination, in .an apparatus for returning the exhaust of the engineto the boiler from which it was taken, consisting of the receiving-vessel for boiler-water under boilerpressure, the exhaust-pipe and the pump located at the suction end of said apparatus7 substantially as described.

4. The combination, in an apparatus for utilizing the exhaust of engines, consisting of the vessel or reservoir A,` adapted to be connected with the boiler and under boiler-pressure, the exhaust-pipe, the nozzle of which is located within the out-'neck of said vessel, and the pump arranged at the suction end of the vessel, as described.

5. The combination, in a device for returning the exhaust of engines by returning it into a boiler under pressure equal to the source of supply, consisting of the vessels A and D,united by a neck, into which the exhaust-nozzle enters, a pump arranged at the outlet end of the'device, all arranged for combined action, for the purpose set forth. i

6. The combination,in an apparatus for utilizing the'exhaust of engines, consisting of the vessel or reservoir A, exhaust pipe and nozzle B b, live-steam chamber D', and the pump E,

arranged at the outlet or suction end of said In testimony that I claim the foregoing as my own invention I affix my signature iii-presence of two witnesses. f

DAVID RENSHAW.

lVitnesscs:

' B. F, MoR'sELL,

EUGENE D. CARUsI. 

